Raspberry PI - Ohmmeter

An Ohmmeter device using Raspberry PI 2B with ADS1015 as ADC

https://github.com/Sherbieny/Ohmmeter-Pi

http://fritzing.org/projects/pi-ohmmeter

Setup

• Items needed:
  • PC or Laptop
  • Raspberry Pi (I used model 2B)
  • ADS1015 12bit ADC converter (if you use 1115 which is 16bit, there will be slight changes)
    • Breadbord, wires, resistors
    • Adafruit assembled Pi T-Cobbler Plus - GPIO Breakout (Optional)
• Circuit setup
  • Refer to fritzing diagrams in schematics folder

• Configuration
  • SSH, VNC or anyother method of communication enabled between the Raspberry PI and the user PC
    • My case was
      • Laptop with Ubuntu 16.04 LTS
      • Raspberry PI 2B with Raspbian Jessie release 2017-01-11-raspbian-jessie.img
      • SSH communication through ethernet cable
• Deployment instructions
  • As per the schematics folder
    • Connect Raspberry with Adafruit T-Cobbler
    • Connect T-Cobbler onto the breadboard
    • Connect ADS1015 onto the breadboard
    • Do the wirings as described in the schematics folder
    • In the circuit diagram I made a note about the location of the UNKNOWN resistor

https://github.com/Sherbieny/Ohmmeter-Pi#information-sourcesInformation Sources

• ADS1015 Schematic (Very useful !)
  • https://cdn-shop.adafruit.com/datasheets/ads1015.pdf
• dev-interface driver at kernel.org
  • https://www.kernel.org/doc/Documentation/i2c/dev-interface
• Voltage divider info
  • https://learn.sparkfun.com/tutorials/voltage-dividers
• An excellent tutorial on basic usage of ADS1115 (basicly same as ADS1015), will clarify a lot !
  • http://openlabtools.eng.cam.ac.uk/Resources/Datalog/RPi_ADS1115/

https://github.com/Sherbieny/Ohmmeter-Pi#built-withBuilt With

• VIM text editor
• GCC compiler